Make text bold and then save in database using TextBox in ASP.Net

Hi

I have TextBox and two button in insert.aspx page

1-BtnBold

2-BtnInsert

I want when I enter text in textbox and select Words from textbox and click on BtnBold it Bold selected word and when I click on BtnInsert it insert Textbox's Text in database with that format

I want do something Like Ckeditor

How I can do it?

Best Regards

Neda